Investigation 6

All of the following are clues that a chemical reaction has taken place except

• a color change

• a solid forms

• the reactant is smaller

• bubbles form

Tags

NGSS.MS-PS1-2

When a solid produced by a chemical reaction separates from the solution it is called

• a precipitate

• a reactant

• a molecule

• the mass of the product

Tags

NGSS.MS-PS1-2

In writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is

• H

• 2H

• H₂

• OH

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

To balance a chemical equation, it may be necessary to adjust the

• coefficients

• subscripts

• formulas of the products

• number of products

Tags

NGSS.MS-PS1-5

According to the law of conservation of mass, the total mass of the reacting substances is

• always more than the total mass of the products

• always less than the total mass of the products

• sometimes more and sometimes less than the total mass of the products

• always equal to the total mass of the products

Tags

NGSS.MS-PS1-5

In an equation, the symbol for a substance dissolved in water solution is followed by

• (l)--lower case L

• (g)

• (aq)

• (s)

Tags

NGSS.MS-PS1-2

In what kind of reaction do two or more smaller substances combine to form a new larger compound?

• decomposition

• ionic

• double-displacement

• synthesis

Tags

NGSS.MS-PS1-1

In what kind of reaction does a single compound produce two or more simpler substances?

• decomposition

• synthesis

• single-displacement

• ionic

Tags

NGSS.MS-PS1-2

The coefficients in a chemical equation represent the

• masses, in grams, of all reactants and products

• relative numbers of moles of reactants and products

• number of atoms in each compound in a reaction

• number of valence electrons involved in the reaction

Tags

NGSS.MS-PS1-5

A balanced chemical equation allows one to determine the

• mole ratio of any two substances in the reaction

• energy released in the reaction

• electron configuration of all elements in the reaction

• mechanism involved in the reaction

Tags

NGSS.MS-PS1-5